As you I'm not so sure about DiskSalv on anything other than 2GB FFS partisions in the first 4GB space of a drive so do like this:
1. Backup the data on the affected partision.
2. Format that partision.
3. Rewrite the data from the backup to the partision.
Formatting should only affect the one partision in question and not overvrite or format any other partisions when it's performed.
